boneless chicken breat--low-fat cooking

Hi all--

Both me and my wife are trying to lose some weight, and we are eating a lot of boneless chicken breasts. I am always looking for new, quick and interesting ways of preparing them at home so it's not always the same old same old. When I cook them, I usually cover them with Chinese Guilin Chili paste and some dijon mustard, and grill it w/o oil in the cast-iron frying pan. But I'm open to other suggestions. Thanks.

Charlie